<!DOCTYPE html>
 <html lang="en">
 <head>
    <meta charset="UTF-8">
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=
 device-width, initial-scale=1.0">
 <title>验证函数调⽤时this指向</title>
 </head>
 <body>
 <script>
   function foo() {console.log("foo函数:", this);
 }
 foo();
 var obj = { name: "gkd" };
 obj.showThis = foo;obj.showThis();
 </script>
 </body>
 </html>